| Duncan to St. Simons (Georgia) | 986.19 mi (1,587.12 km) |
| Duncan to Stafford (Texas) | 366.42 mi (589.69 km) |
| Duncan to Stallings (North Carolina) | 978.63 mi (1,574.95 km) |
| Duncan to Stamford (Connecticut) | 1,399.33 mi (2,252.01 km) |
| Duncan to Stanford (California) | 1,366.29 mi (2,198.84 km) |
| Duncan to Stanton (California) | 1,146.69 mi (1,845.41 km) |
| Duncan to Star (Idaho) | 1,175.48 mi (1,891.76 km) |
| Duncan to Starkville (Mississippi) | 525.91 mi (846.38 km) |
| Duncan to State College (Pennsylvania) | 1,175.94 mi (1,892.50 km) |
| Duncan to Staten Island (New York) | 1,362.34 mi (2,192.48 km) |
| Duncan to Statesboro (Georgia) | 940.64 mi (1,513.81 km) |
| Duncan to Statesville (North Carolina) | 965.68 mi (1,554.12 km) |
| Duncan to Staunton (Virginia) | 1,076.84 mi (1,733.01 km) |
| Duncan to Steamboat Springs (Colorado) | 636.86 mi (1,024.93 km) |
| Duncan to Steiner Ranch (Texas) | 288.50 mi (464.29 km) |
